I forget if it's a right or left click while looking at the target through the binocs but that's how you do it. I had to take out some buildings on the street to get a better view of the tanks. Not sure how I targeted the buildings, I think it was by accident, but you still have to turn and burn a few of the enemy coming up behind you between bomb drops. Also..... listen carefully after sighting the target for a radio reply saying something about acknowledging your message. Once you hear that you can take your eyes off the target and take care of the ones on the stairs.